Valve.



C. E. BROWN.

VALVE.

APPLIOATION nun HOV. 30,1903.

Patented Feb. 22, 1910.

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CURTIS E. BROWN, OF TUCSON, ARIZONA TERRITORY.

VALVE.

Specification of Letters Patent.

Patented Feb. 22, 19.10.

Application filed November 30, 1908. Serial No. 465,162.

To all whom it may concern:

Be it known that I, CURTIS E. DROWN, citizen of the United States,residing at Tueson, in the county of Pilna and Territory of Arizona,have invented certain new and use t'ul Improvements in Valves, of whichthe following is a specification.

This invention relates to valves, and has for its object to provideanimproved rotary valve which requires no packing and in which thepressure of the fluid will assist in holding the valve closed.

The valve can take the place of any ordinary globe or plug valve and hasadvantages of simplicity and cheapncss as will be more fully apparentfrom the following description.

An embodiment of the invention is illustrated in the accompanyingdrawings in which Figure 1 is a side view of the valve; Fig. 2 is acentral longitudinal section; Fig. 3 is a top plan view with the cap ofthe Valve removed.

The casing of the valve is somewhat similar to that of an ordinary globevalve, and may be varied according to circumstances or in any mannerdesired. The inlet is indicated at 6 and the outlet at T, and a cap 9screwed into the top may be removed for access to the interior thereofwhen desired. A diaphra m extends across within the body of the va ve,said diaphragm being indicated at 1 and provided with asegmental opening10 therein. This diaphragm forms the seat, and is machined or planedflat on one side and ground down true to form a smooth and even seat.

The valve consists of a segmental plate or piece 2 the under surface ofwhich is ground to fit closely against the valve seat 1, and which is ofproper size and shape to cover the opening 10 when the valve is closed.This valve 2 is provided with a stern' l extending through the ing onthe side opposite to the cap 9, and said stem is provided with a handle5 whereby it may be turned. The bearing for the valve stem isconveniently formed in an enlarged or thickened portion of the diaphragmor partition which extends across the valve body. Stops 11 and 12 limitthe turn of the handle, at open and closed rlosition respectively.

The valve 2 is located on the pressure side, and it projects outwardlyaround the stem,

wall of the valve casi on all sides, as indicated at 13, the projectingshoulder forming a tight joint which prevents any leak beside the valvestem and makes the use of packing unnecessary. The valve 2 swings orturns to open or closed position, and a quarter turn will give a fullopening, by con'ipletely uncovering the opening 10. In consequence ofthe pressure a close contact is maintained between the valve and thevalve seat, the stem being sufiiciently loose to allow the valve to bepressed into contact with the seat at all times, and the pressure notonly assists in holding the valve closed, but also assists in preventingleakage through the valve or beside the valve stem. 7

The valve may be used for steam, water, air, or other fluids, and itacts very quickly both in opening and closing. There is no packing towear out, and wear on the valve makes no difference since it will alwayspress tightly to its seat. Inasmuch as the valve swings over the openingfrom the side, there is little or no possibility of grit being caughtunder the valve, as with valves which move toward and from their seats.Injury to a valve or valve seat is frequently caused by catching grit ordirt between the valve and seat, and, the valve being then pressed hardto prevent the leak, the seat or the valve will be dented, and so soonruined. With the present valve, it turns or sweeps over the seat,whereby grit or the like will be wiped or swept off, and the valvecannot thus be injured in the manner indicated. The use of washers andthe like is unnecessary, since the two smooth contacting surfaces, incon sc uence of the pressure, will form a tight va ve, and the partswill tend to wear smooth, rather than otherwise. Of course packing maybe provided around the stem if desired, but will ordinarily beunnecessary. The use of washers or packing on the face of the valve,which require frequent replacing and constitute the chief objection toan ordinary globe valve, is entirely obviated. A spring washer 15 ispreferably located between the handle and the casing.

I claim:

A valve comprising a casing with a diaphragm across the same providedwith a central opening and a plane surface around the same forming avalve seat, a partition connecting said diaphragm with the base of thecasing, provided with a bore leading through the said casing base, asegmental turningvalve-plate on the upper pressure or inlet side of thediaphragm and rovided with a plane face resting upon an against saidseat, and a stem projecting from said plate downwardly throu h saiddiaphragm bore, the said plate promoting beyond the upper end of sa1dstem entirely therearound to form a tight joint around the upper end ofthe said bore, and a handle upon the lower outer end of said stem.

\Vitnesses CURTIS E. DROVVN.

CHARLES G. FULLER, PAUL GATLIN.

